A186048 Number of (n+2)X7 binary arrays with each 3X3 subblock singular

434174, 23369314, 1231779874, 56374248542, 2795398080908, 137706977983060, 6706785849517148, 329259361852366620, 16148770445584988556, 791374910346450939836, 38812042507333999328862, 1903281945814156244309626

Offset

1,1

Comments

Column 5 of A186052

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4X7
..0..0..0..1..0..1..1....0..0..0..1..1..0..0....0..0..0..1..1..0..0
..0..0..0..1..0..0..0....0..0..0..0..1..0..1....0..0..1..0..0..0..0
..0..0..1..1..0..0..1....0..0..0..0..1..0..1....0..0..0..1..1..0..1
..0..0..0..1..0..1..1....0..0..0..0..0..0..0....0..0..1..0..0..1..1

Crossrefs

Sequence in context: A117318 A085092 A117151 * A306867 A163612 A238069

Adjacent sequences: A186045 A186046 A186047 * A186049 A186050 A186051

Keyword

nonn

Author

R. H. Hardin Feb 11 2011

Status

approved